Various, Kayangan, Angel Hearts, Laser Ray, Steeler, Trooper, Hydra, Saxo, Kayangan, Rhythm Machine, A.S.K., Riyadh

Bay Area Thrash Metal

Riffs cut like machine tools, tempos past 200bpm, and a garage circuit that rewrote American metal.

West Midlands Metal

Downtuned riffs from a factory city — Sabbath to grindcore, four decades of Birmingham making music heavier.